software.amazon.awscdk.services.emr

Interface CfnCluster.AutoScalingPolicyProperty

All Superinterfaces:

software.amazon.jsii.JsiiSerializable

All Known Implementing Classes:

CfnCluster.AutoScalingPolicyProperty.Jsii$Proxy

Enclosing class:

CfnCluster

@Stability(value=Stable)
public static interface CfnCluster.AutoScalingPolicyProperty
extends software.amazon.jsii.JsiiSerializable

`AutoScalingPolicy` is a subproperty of `InstanceGroupConfig` .

AutoScalingPolicy defines how an instance group dynamically adds and terminates EC2 instances in response to the value of a CloudWatch metric. For more information, see Using Automatic Scaling in Amazon EMR in the Amazon EMR Management Guide .

Example:

 // The code below shows an example of how to instantiate this type.
 // The values are placeholders you should change.
 import software.amazon.awscdk.services.emr.*;
 AutoScalingPolicyProperty autoScalingPolicyProperty = AutoScalingPolicyProperty.builder()
         .constraints(ScalingConstraintsProperty.builder()
                 .maxCapacity(123)
                 .minCapacity(123)
                 .build())
         .rules(List.of(ScalingRuleProperty.builder()
                 .action(ScalingActionProperty.builder()
                         .simpleScalingPolicyConfiguration(SimpleScalingPolicyConfigurationProperty.builder()
                                 .scalingAdjustment(123)
                                 // the properties below are optional
                                 .adjustmentType("adjustmentType")
                                 .coolDown(123)
                                 .build())
                         // the properties below are optional
                         .market("market")
                         .build())
                 .name("name")
                 .trigger(ScalingTriggerProperty.builder()
                         .cloudWatchAlarmDefinition(CloudWatchAlarmDefinitionProperty.builder()
                                 .comparisonOperator("comparisonOperator")
                                 .metricName("metricName")
                                 .period(123)
                                 .threshold(123)
                                 // the properties below are optional
                                 .dimensions(List.of(MetricDimensionProperty.builder()
                                         .key("key")
                                         .value("value")
                                         .build()))
                                 .evaluationPeriods(123)
                                 .namespace("namespace")
                                 .statistic("statistic")
                                 .unit("unit")
                                 .build())
                         .build())
                 // the properties below are optional
                 .description("description")
                 .build()))
         .build();
 

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	CfnCluster.AutoScalingPolicyProperty.Builder A builder for CfnCluster.AutoScalingPolicyProperty
static class	CfnCluster.AutoScalingPolicyProperty.Jsii$Proxy An implementation for CfnCluster.AutoScalingPolicyProperty

Method Summary

Modifier and Type	Method and Description
static CfnCluster.AutoScalingPolicyProperty.Builder	builder()
Object	getConstraints() The upper and lower EC2 instance limits for an automatic scaling policy.
Object	getRules() The scale-in and scale-out rules that comprise the automatic scaling policy.

Methods inherited from interface software.amazon.jsii.JsiiSerializable

$jsii$toJson

Method Detail

getConstraints

@Stability(value=Stable)
 @NotNull
Object getConstraints()

The upper and lower EC2 instance limits for an automatic scaling policy.

Automatic scaling activity will not cause an instance group to grow above or below these limits.

getRules

@Stability(value=Stable)
 @NotNull
Object getRules()

The scale-in and scale-out rules that comprise the automatic scaling policy.

builder

@Stability(value=Stable)
static CfnCluster.AutoScalingPolicyProperty.Builder builder()

Returns:

a CfnCluster.AutoScalingPolicyProperty.Builder of CfnCluster.AutoScalingPolicyProperty